Microwave-powered domestic hot water heater



FIG. 1 is a front perspective view of a microwave hot water heater showing my new design;

FIG. 2 is a rear perspective view thereof;

FIG. 3 is a right side elevational view thereof, the left side being a mirror image of that shown;

FIG. 4 is a top plan view thereof; and

FIG. 5 is a bottom plan view thereof. 

The ornamental design for a microwave-powered domestic hot water heater, as shown and described. 